Rik Herrin wrote:
> Wouldn't connecting a UPS + using a stable kernel
> version remove 90% or so of the "RAID-5 write hole"
> problem?

There are some RAID systems that you'd rather not have redundant power on.

Think encryption.  As long as a system is online, it's normal for it
to have encryption keys in memory and it's disk systems mounted
through the decryption system.  You wouldn't want someone to be able
to steal your server along with the UPS and stuff it in a van with a
power inverter :-).
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